Analysis of the high-resolution Fourier transform infrared spectra of the nu(3) and nu(5) bands of thionylimide (HNSO)

The first high-resolution (0.002 cm(-1)) infrared spectra of the reactive molecule thionylimide, HNSO, are reported. The nu(3) (NS stretching) and nu(5) (NSO bending) fundamentals at 1086 and 448 cm(-1), respectively, have been analyzed in detail. The ground state rotational constants have been substantially improved by a simultaneous fitting of previously reported microwave data and a large number of infrared combination differences. The excited vibrational state constants of both type A/B hybrid bands have been obtained from fitting assignments over a wide range of J and K-a values. No perturbations were detected in either band. (C) 1996 Academic Press, Inc.